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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef UI_AURA_ENV_OBSERVER_H_
6 #define UI_AURA_ENV_OBSERVER_H_
7 
8 #include "ui/aura/aura_export.h"
9 
10 namespace aura {
11 
12 class RootWindow;
13 class Window;
14 
15 class AURA_EXPORT EnvObserver {
16  public:
17   // Called when |window| has been initialized.
18   virtual void OnWindowInitialized(Window* window) = 0;
19 
20  // Called when |root_window| has been initialized.
OnRootWindowInitialized(RootWindow * root_window)21  virtual void OnRootWindowInitialized(RootWindow* root_window) {};
22 
23   // Called when a RootWindow's host is activated.
OnRootWindowActivated(RootWindow * root_window)24   virtual void OnRootWindowActivated(RootWindow* root_window) {}
25 
26   // Called right before Env is destroyed.
OnWillDestroyEnv()27   virtual void OnWillDestroyEnv() {}
28 
29  protected:
~EnvObserver()30   virtual ~EnvObserver() {}
31 };
32 
33 }  // namespace aura
34 
35 #endif  // UI_AURA_ENV_OBSERVER_H_
36